Specification of M50 concrete mix design

Concrete mix design belongs to the method of determining the ratios of concrete mix in terms of proportions of cement, sand and coarse aggregates.

As for instance a concrete mix of proportions 1:2:4 signifies that cement, fine and coarse aggregate are in the ratio 1:2:4 or the mix comprises of one part of cement, two parts of fine aggregate and four parts of coarse aggregate.

The concrete mix design proportions are both by volume or by mass. The water-cement ratio is normally stated in mass.

The mix design M-50 grade (with Admixture –Sikament) presented here is for reference purpose only. Actual site conditions may fluctuate and consequently, this should be modified as per the location and other factors.

M50 Grade concrete is mostly suitably in heavily reinforced structures to withstand dynamic loading.

Given below the specifications of M50 Concrete Mix Design

Grade Designation = M-50
Type of cement = O.P.C-43 grade
Brand of cement = Vikram ( Grasim )
Admixture = Sika [Sikament 170 ( H ) ]
Fine Aggregate = Zone-II
Sp. Gravity
Cement = 3.15

Fine Aggregate = 2.61
Coarse Aggregate (20mm) = 2.65
Coarse Aggregate (10mm) = 2.66
Minimum Cement (As per contract) =400 kg / m3
Maximum water cement ratio (As per contract) = 0.45

Mix Calculation: –
1. Target Mean Strength = 50 + ( 5 X 1.65 ) = 58.25 Mpa

2. Selection of water cement ratio:-
Suppose water cement ratio = 0.35

3. Calculation of water: Estimated water content for 20mm max. Size of aggregate = 180 kg /m3 (As per Table No. 5 , IS : 10262 ). As plasticizer is projected, water content is decreased by 20%.

Water content is taken as 180 X 0.8 = 144 kg /m3

For more details, click on the following link engineeringcivil.com

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Published By
Rajib Dey
www.constructioncost.co
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AStrutTie – A powerful software for structural analysis and design

HanGil IT is the developer of AStrutTie, a powerful software for creating perfect structural design. It is primarily applied to make analysis and design a strut-tie model for concrete members which contain disturbed stress region(s).

It facilitates the users to create the design of corbel (bracket), abutment/pier footing, bridge pier coping (pier cap), frame corner, anchorage zone, deep beam, etc. The software is compatible with U.S (ACI 318, AASHTO LRFD) and Europe (EuroCode 2) codes and specifications.

A concrete member is categorized as B-region(s) and D-region(s). D-regions belong to parts of structure in which the strain distribution is extremely nonlinear. The design practices for D-regions are generally dependent on empirical approaches. The strut-tie model approach produces a superior concept concerning load transfer mechanisms as well as structural behavior and it empowers the designer to deal with unconventional situations including D-regions.

AStrutTie is a handy software for making analysis/design of concrete members having D-region(s). The most perfect strut-tie models are developed based on the principal stress flows and/or evolutionary structural optimization (ESO) results.

AStrutTie comprises of a specialized solver that can efficiently manage any sorts of internally/externally (in) determinate strut-tie models. The strut-tie model provisions of ACI 318-14 (2014), AASHTO LRFD (2014), and EC2 (2004) are employed.

In order to make quick and efficient strut-tie model designs, multirole templates are arranged for corbel (bracket), abutment footing, pier footing, bridge pier coping (pier cap), frame corner, anchorage zones with inclined and straight tendons, and deep beams with concentrated and distributed loads.

The shapes of concrete members and truss models are also formed by importing .dxf files. Advanced element sets illustrating truss mechanism, truss and arch mechanism, and fan action are arranged.

AStrutTie offers different automated design checks reclassifying the conditions for rebar necessity and strength validation of struts and nodal zones. Visual validations of strength conditions can also be done.

A structural design report is automatically created, and design results are evaluated by forecasting the report. The structural design report is printed as a .rtf or .xlsx file.

Click on the following link to download the software www.concretenetwork.com

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Published By

Rajib Dey

www.constructioncost.co

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